Second Python FizzBuzz attempt

fizzbuzz2.py

class FizzBuzz:

    rules = { 3: "Fizz", 5: "Buzz" }

    def __init__(self, start, stop):
        self.start = start
        self.stop = stop + 1

    def value_for(self, value):
        output = ""

        for divisor, outcome in self.rules.iteritems():
            if value % divisor == 0: output += outcome

        return output or str(value)

    def fizz(self):
        while self.start < self.stop:
            yield self.value_for(self.start)
            self.start += 1

for result in FizzBuzz(1, 100).fizz():
    print(result)